Sawing-trimming machine



Spt. 1; 1931. c. B, NELSON 1,821,569

SAWING-TRIMMING MACHINE Filed March 19, 1929 6 Sheets-Sheet l Sept. 1,1931. c. B. NELSON SAWING-TRIMMING MACHINE Filed March 19. 1929 6Sheets-Sheet 2 7 2X05" CIIZ/IQLGZZCZILE. 072/ wzessz Sept. 1,1931. B ELN 1,821,569

SAWING-TRIMMING MACHINE Filed March 19, 1929 e Sheets-sheaf. s

Sept. 1, 1931.

C. B. NELSON SAWING-TRIMMING MACHINE Filed March 19. 1929 6 Sheets-Sheet4 Sept. 1, 1931. c. B. NELSON 1,821,569

SAWING-TRIMMING MACHINE Filed March 19, 1929 6 Sheets-Sheet 6 zz/enzoWicca/0W0 7b,

Patented Sept. 1, 1931 uNrrsn STATES CHRISTIAN B. NELSON,

on 0311111610, rumors sAwiNc-TRIM ING ACHI E Applicatio filed March19,1929. Serial No. 348,263. i

This invention relatesto' improvements in sawing-trimmingmachines,*usually designated as saw-trimmers.

One object of the invention is to provide.

5 an improved machineof compactconstruct on havlng a power dr ven sawwhich can be raised and lowered to position the samei for the differentcharacters of work to be performed.

vide trimming mechanism which will trim or smooth the ends of the sawedarticle, removing any rough surfaces or burrs left by the saw. 1

A further object of the invention relates to means for adjusting thetrimming device to 'vary the depth ofcut thereof, said adjustingmeansbeing arranged to adjust thecutters simultaneously toexactlythe's'ame extent.

means for grinding the cutters and insuring that .the same will be ofthe same length and i 'cess 1 1? adapted to holdvarious implements "andtools "for; usein'making adjustments on the machine. The'side wallsofthe table are thus when in use will cut a smooth surface.

means for under cutting means for m1ter1ng.

Other ob ects of the consideration of the following specification andaccompanying drawings wherein: Fig. 1 is an e'ndlelevation of themachine. Fig. 2 is a"brokenzsideelevationthereof.

' Fig. 3 is a top plan view.

Fig. 4 is a broken vertical sectional view taken on line 44 of Fig. 3. 4

Fig. 5 is an end elevation parts being shown in vertical section. 1 r

Fig. 6 is a broken side elevation of a portion of themachine in theregion of. the saw. Fig. 7is a brokenplan view 'taken on line 7-7 ofFig. 4.

\ Fig. 8 is a perspective View of the grinding mechanism.

Fig. 9 is-a broken plan .viewof details of the mitering clamps".

Fig. 10 is a detached perspective view of two portions thereof.

In the drawings, 10 indicates a hollow-sup porting pedestal or columnhaving. abase 11 Another object of the invention is to pro- Anotherobject of the invention relates to A further object relates totheprovision of and additional the invention relate to 7 various featuresof construction and arrange 'ment of parts which will-be apparent from.30

provided with a compartment 12 into which the shavings and other wastematerial re- -moved by thesaw and thetrimming mechanism. are collected;such material passing down from the'saw and cutters,throughthe hollowpedestal; into the compartment.

As the present specifically shown and described embodiment of theimprovement'is designed particularly foruse in printing shops for sawingand trimming line-o-type or monotype machine slugs and for other relatedwork, the saving of the waste material is desirable. The compartment isclosed by a removable door'12 having any suitable latching meansthereon; operable by the knob or handle 12?. To the upper end of thepedestal 10 is secured a head 13 whichsupports a table base 14: andother operating parts .of themachine. The'head'lghasflaring flanges'l'3i which collect and direct thesaw and trim mer cuttings {into thepedestallO (see Fig. 6)

Thetable'is preferably formed with a reprovided vwith parallelrectangular bars 16 "secured to the-upper edges of the sides 17 thep0rtion18'is'in the same horizontal plane with the upper opposite sideportion 19 of the'tableQ The sli'dableportion 18 carries a gauge,indicated generally by the numeral "20, and lockingdevi'ce 21; both ofwhich will be referred to more specifically hereinafter.

The head 13 has a laterally extending support 22 which ha's'a verticalbore within which slides the short-shaftor slide 23 on the up-f per endof which is mounted the saw and grinder shaft 24. The support 22 is inthe form of a split cylinder andhas each free' edge provided witha-flange 22 provided with l a tightening screw 26anola pair of stopscrews 27 whereby the support can be suitably contractedor-tightenedwith reference to the slide 23 "toprevent vibration of the saw andgrinder duringtheoperation ofthe machine' The slide 23 has securedthereto a vertical guidebar 28 which is disposed between the flanges 22of the support 22 and prevents rotation of the slide 23.

As shown in Fig. 4, the shaft 25 is preferably provided with ballbearings 29 and is housed in a bearing sleeve 30 which is secured on theupper end of slide 23 by arms 31 which are. adapted to be tightened by.means of screws 32 (see Fig. At one end,'the shaft 25 carries a grindingwheel 33, and at its opposite end a circular saw 34. 'A pulley 35 issecured to the shaft over awhichzpasses a V-shaped belt 36 which isdriven by the drive pulley 37 of a motor 38--which is mounted on the arm39, as clearly shown in Fig. 2. The arm 39 is adjusta'bly secured tothelower threaded end 40 oftheslide23 by. means of a pair of knurlednuts 41. Rotation ,of the.

arm 39 about the threaded portion .40 is, prevented by-aset screw 40-which projects into the longitudinal-slot 40 provided in said member40. ,By adjusting'the-nuts41u wardly or downwardly thearm .39 can elowered and-the belt 36tightened. Itwill t-hus'be seen that whentheslide 23 is raised or lowered the .motor, the. saw, and grinder arecarried therewith as. a unit, and that raising or lowering the sawdoesnot change the tension ofthe belt v36. For raising or lower- .ingthe saw I provide .a threaded shaft-.42 which is concentric with theslide .23 and meshes with inner threads in'the lower por- Ition oftheslide, as shown:insFig.;4. 'The shaft is provided with a bevel gear.143 at its the arm which extendsforwardly through -';upper end and issupported on the end 44* of a longitudinal opening23" formed in theslide 123. (See Fig.5). A collar 44".is secured to -'the shaft 42,.as-shown in Fig. 4, .which to- ,getherwith theinterposed thrust washers45, resist vertical movementcofithe.shaft as the same .is. rotated.

.By :rotating the shaft 42 with reference 7 tothe threaded portion-23ofm'ember23; the

-.latter will: be raised. or --lowered-.-depending upon the direction:of rotation of.the sha'ft. The bevelled gear-.43 meshes with a;pin1onf46 ycarriedhon the shaft--47, which :extends a thIQL glIrZL boss48 integral with the support .23. .A collar 49 is securedto1the-shaft-.47- and jprevents inward movementofthe gear:':46.

The outer: end ofzthe-shaft47-is supported. in

a bearing bracket 50 which is carriedonlthe v:arm 44;previouslydescribed. 5A crank, 5.3--;is

:securedto the end. of the.-shaft:47 whereby the same can be rotatedfforeffecting the raising and loweringof the slide" 23, andlt-hus also thesaw arbor.

The saw 34'is;preferablysecured by screws to the circular plate56-which: isthreaded .Asecond threaded-portion 58.0f the shaft carries1a knurled: adjusting nut 59 whichanaybe .1 locked in ,position."bymeanest: set screws 52 .--.on the portion 58. Thenut .59iwhen turned "ina: direction tonmove': to. th'ezleftg asrviewed .iary {holding ;tool,:indicated the. numeral 68. -tion 69- and-azhase'l'Ojhaving a true lowersurface which is; adapted'to ;rest upon the edge of. the stationarytableportion 19 adon. the reducedextension 5.7 oftheishaft: -24.

-sa-wing line-o-type or monotype printing slugs, as it isessential thatthe ends be square and smooth. In using the machine, the gauge :stop.20is adjusted properly, andtheslugs,

such as are shown at 63. inFig. 3, are placed against the graduatedgaugebar64, andare then clamped in position by a suitable clamping devicesuch as is illustrated at21. As the clampingdevice and gauge form thesub ect matter of other applications, they will not .bedescribed indetail herein.

However, when the lever is thrown forward, the bar 66 will be'force-dtightly-against the slugs 63 .and held firmly in position againstthegraduated gauge member 64. By sliding the. tabletop 18, the slugs aremoved against the saw 34 and are sawed off at. sub

stantially the proper length. Continuing 1;

the movement beyond-the range ,of the saw teeth,t he-.ends. of the slugs63 will be brought into, position .to be trimmed to ;the exact dimensionby thetrimming knives 60, preferably three, in number. ,-By throwingthe" lever 65 back,:the slugs are released.

As" will be apparent, the knives 60 must' be of exactly the samelengthin order to cut aperfectly smoothsurface on the ends of the slugs.IToenable-an operatorrto regrind' the knives properly, I have providedanauxilgenerally by .Thisztoolhas a handle porjacent the grinding wheel33. Afdepending flange 7 lzis-a'dapted-to fit over the edgeof the tableand slides. alongithe ledge 7 2 thereof.

lt will thus be seen 'thatbymoving: thehold-" er 68 against the-forwardedge of the 'table and against the upper surface thereof, it

can he slid back and forthito bring a cutter 60 into {grinding positionwith *reference 'to the wheel-'33. Theend of the holder has a' socket:forming member 73 therein, in

which a cutter 60 to be ground is inserted. Theopposite end ofthe'socket member car ries a threaded adjusting screw 74 having a Flocknut ".75 thereon. A locking screw 76 is also provided for holding thecutter 6O firmly in position. NVhena set-ofcutters requires regrinding.the adjusting screw -:74 can be turned into the proper" position and.locked by the-dock nut 75. A cutter "is nsansee cutter inserted, thescrew 7 4 being left, however, in its previously adjusted position. Itwill be apparent that by this device all the cutters of a set can beground to exactly the same pitch and length, and that when placed in theposition shown in Fig. 4, and properly adjusted by means of the nut 59,the cutting edges thereof will project exactly the same distance beyondthe face of the saw 34.

Secured to the forward stationary portion. 19 of the table top is aramming member 78 which is adapted to be tightened in position by meansof a screw 79 to hold the same against accidental movement when. not inuse. This member has a rib, not shown, which extends into a transverseslot 80 formed in the table portion 19, whereby the face of thestopmember is held in parallel relation with reference to the plane ofthe saw when the said member is manually reciprocated to ram the slugsfirmly against the stop 20 prior to clamping the slugs in position forthe cutting off operation.

In employing the machine for under cutting or sawing rectangularopenings in plates, for example, the handle 52 is operated to lower thesaw the desired extent, in which position the hinged portion 82 of thestationary side of the table 19 will be lowered to the plane of thetable and will overlie the saw arbor thus providing an unobstructedsurface for the plate for performing the operation.

As will be seen, the cutter blades are disposed inwardly of thecircumference of the saw sufficiently so they will not function during.

When the saw. is again raised for out off sawing or trimming :1thehinged portion 82 is raised by the up-.

the under cutting operation.

wardly moving sleeve 30 engaging a lug 83 formed on the lower surface ofsaidhinged portion.

The machine can also be used for sawing slugs or other articles at anangle, as in forming miter points. iary clamp form 86 is placed over thegauge bar 64 as indicated in Fig. 9, a stud 86 fitting in an opening 87to hold the form in position. The form has two wings 88 disposed at 45angles. Secured to an adjacent corner of the movable table is a block 89through which passes a screw 90 to the end of which is secured a clamp91 having a rib (not shown) which slides in the groove 92 of the tabletop. Theclamp 91 has a vertical face 93 disposed at a 45 angle andbetween the same and the adjacent face 88 of the form 86 the articles tobe mitered are clamped by the screw 90.

For this purpose the auxil s The table ismoved forwardly, carrying thearticles against the saw for cutting and trimming. The articles, if tobe mitered on the opposite ends also are then placed against the otherface 88 of. the form 86 in proper position. A triangular block 94,having a recess 95 therein andatransversepin 96 in the recess, is thenplaced in engagement with the end of the clamp bar 66, the pin 95fitting in the recess or notch 97 formed in the bar near its end. Theclampis 'then moved forwardly locking the block 94 firmly against thearticle, such .as is illustrated at- 98in Fig.9. The movable tableisthe'n operated to perform the sawing and trimming, as before. .7

:Aguard98 isprovidedfor the grinding wheel 33 and a guard 99 forthe saw34, the latterbeing pivoted at 100 to a lug. 101 formed onthe lower sideof the stationary table portion 19. 1 1 1 7 An outlet box 102 is securedat any suitable place to the machine, asto the support22, the currenttothe motor 38 being carried by the armored cables 103 and controlled bya switch 104 placed near the forward end of the ma= in said cylinder, amotor driven tool carried by said slide,;a support secured to andmovable with said slide, a motor carried by said support, and means foroperating said slide with reference to said cylinder for raisingandlowering said tool. I 2. In combination a saw table, a supporttherefor, a guide member carried by said support, a slide member movablethrough said guide ;member,'a saw carried by saidslide member, and meansfor adjusting said slide member vertically to-raise and lower said sawwith respect to said table.

3. In combination a saw table, a support therefor, a guide membercarried by said sup port, a slidejmember movable through said guidemember, a saw carried by said slide member, and means for adjusting saidslide member vertically to raise and lower said saw with respect to saidtable, said guide member being adjustable for tightening the same withrespect to said slide member.

4. In combination, a support, a guide member secured thereto, saidmember being in the form of a split cylinder having outwardly disposedflanges, a slide member movable vertically within said cylinder andhaving a longitudinal rib disposed between said flanges to preventrelative rotation of said guide and slide, and means for adjusting saidflanges relatively one to the other for control-:

lingi the clearance between the cylinder wall and said-slide.

5. In combination, a support,a guide member secured thereto, a slidemember movable 5 within said support,.a rotary tool carried by saidslide, means for raising and lowering :said slide for varying theelevation of said tool, an arm supported by said slide, a motor carriedby said arm andhavinga belt for -driving-said tool, and'lneansfor'adjusting said-arm on 'said slide for varying the tensionofsaidbelt.

r 6. -In combination, a support, a guide member secured thereto, a slidemember movable 7515 within said support, a rotary tool carried by saidslide, means for raising and lowering -saidslide for varying theelevation of said tool, an arm supported by said slide, a motorcarried'by said arm and having a belt'for driving said tool, and meansfor adjusting said arm on said slide for varying the ten sion of saidbelt, said'last named means comprising a pair of coaotingmembersthreadedly carried by said guide, one above and the other below saidarm.

7. In combination, a saw table having a slidable table section, astationary bar secured to-said section, a pair of clamping memoers onedisposed on each side of said bar, said 7330 members having clampingfaces disposed at angles to said bar, and a stopmember removably securedto said bar and provided with a pair of faces each'complemental to theclamping face of one of said clamping members whereby articles to besawed can beheld at an angle with respect to said bar.

*8. In combination, asaw table having a slidable table section, astationary transverse bar securedto said section, a clamp for holdingarticles to be sawed rigidly against saidbar for cut oif sawing, and apair ofaux- -iliary holding members one adapted-to be 'detachablysecured to said clamp and the other to said bar, said holding membershaving complemental vertical faces inclined with respect'to said barfor-holding articles to be sawed at a bevel.

'In testimony whereof,I havehereunto af- 50 fixed ysignature.

CHRISTIAN B. NELSON.

